Extended attributes are name:value pairs associated with inodes
(files, directories, symbolic links, etc.). They are extensions to
the normal attributes which are associated with all inodes in the
system (i.e., the stat(2) data). A complete overview of extended
attributes concepts can be found in xattr(7).
removexattr() removes the extended attribute identified by name and
associated with the given path in the filesystem.
lremovexattr() is identical to removexattr(), except in the case of a
symbolic link, where the extended attribute is removed from the link
itself, not the file that it refers to.
fremovexattr() is identical to removexattr(), only the extended
attribute is removed from the open file referred to by fd (as
returned by open(2)) in place of path.
An extended attribute name is a null-terminated string. The name
includes a namespace prefix; there may be several, disjoint
namespaces associated with an individual inode.

ENOATTR
The named attribute does not exist. (ENOATTR is defined to be
a synonym for ENODATA in <attr/xattr.h>.)
ENOTSUP
Extended attributes are not supported by the filesystem, or
are disabled.
In addition, the errors documented in stat(2) can also occur.

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Linux 2015-05-07 REMOVEXATTR(2)